Retractable Pull Rod Assembly with Gear Locking Mechanism
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Solution Overview
Problem
Existing retractable trolley structures in toolboxes are complex and lack smooth operation, reducing user experience.
Innovation Solution
A retractable pull rod assembly with a cross rod body, button member, gear member, and elastic member, where the button member drives the gear member to shrink the drive member, allowing the connecting rod and pull rod to unlock and lock smoothly through a transmission mechanism, enhancing ergonomic feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional telescopic trolley structure is used, then the toolbox can be moved, but the structure becomes complex and the telescopic operation is not smooth
Solution Approach 1:
The trolley structure is divided into independent functional modules: the telescopic pull rod assembly with button member and gear member for locking/unlocking, the connecting rods for structural support, and the elastic member for automatic return. This segmentation allows each component to perform its specific function efficiently, simplifying the overall structure while maintaining smooth telescopic operation.
2Reliability
If a simple pull rod structure is used, then the device complexity is reduced, but the locking and unlocking mechanism lacks reliability
Solution Approach 1:
The elastic member is configured to automatically push the drive member back to the locked position after the button member is released. This self-service mechanism ensures reliable locking without requiring additional actuators or complex control systems, maintaining structural simplicity while guaranteeing operational reliability.
Solution Approach 2:
The gear member and button member are designed to engage the protruding part of the drive member in advance before movement occurs. This preliminary engagement ensures that the locking mechanism is already prepared and positioned correctly, preventing any ambiguity or failure during the locking/unlocking process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution simplifies the unlocking and locking process, improves the smoothness of the retractable pull rod assembly, and significantly enhances user experience by providing a more intuitive and efficient operation.
Implementation Method 1
a driving member and an elastic member set in the cross rod body. The button member, the gear member and the driving member are connected to each other by transmission, the button member can drive the driving member to shrink in the cross rod body through the gear member, and the driving member can automatically return to position through the elastic member
Data Source
AI summary
The application discloses a horizontal rod, a retractable pull rod assembly and a toolbox, the retractable pull rod assembly includes two opposing connecting rods, a horizontal rod snapped to the ends of the two connecting rods and a pull rod retractable in the connecting rods, the horizontal rod includes a horizontal rod body and a button member, a gear member, a drive member and an elastic member provided in the horizontal rod body. The button member, the gear member and the driving member are connected to each other by transmission, and the button member can be driven by the gear member to contract in the body of the horizontal rod, and the driving member can be automatically returned by the elastic member, so that the connecting rod and the pull rod can be unlocked and locked with each other. This application can be retractable pull rod assembly structure is simple, use more smoothly, enhance the using feel.